Gang-mold for casting posts of cement concrete



C F.. RUBY.

GANG MOLD FOR CASTING POSTS 0F CEMENT CONCRETE.

'APPLICATION FILED APR. 7, 1919.

1,33 1 ,028. Patented Feb. 17, 1920.

witn es: Emncntnr CHARLES E. RUBY, or sH WNEE, OKLAHOMA.

GANG-MOLD FOR CASTING POSTS OE CEMENT CONCRETE.

Specification of Letters Patent.

Patented Feb. r7, 1920.

Application filed April 7, 19 19. Serial No. 288,430.

To all whom it may concern:

Be it known that I, CHARLEs F. RUBY, a citizen of the United States, residing at Shawnee, Oklahoma, have invented new and useful Improvements in Gang-Molds for Casting Posts of Cement Concrete.

It has been customary to cast such posts in g, ng molds of square form and posts cast in such forms were either only taper on two sides, while the best posts ought to be taper on four sides, or the work ofcasting same was very cumbersome.

In such molds the bottom is usually covered with the moistened aggregate, then one or two steel rods or wires are laid in for reinforcements, then more aggregate is added to fill the post mold to within one inch of the top. One or more rods are then laid in each compartment, then the mold is finally filled and smoothened on top. It

has been found rather difiicult to hold the wires or rods in while placing the In such molds only are usually cast at one time.

The superiority of my invention will at once be seen when one can stretch the reinforcing wires in approximately 200 in dividual mold compartments. Before filling any aggregate into the mold,'this being done from a central position and the reinforcing wires held in a taut positlon, while filling the mold, and then pile slush aggregate in large quantity bed containing the compartments and with such tools as a hoe, a straight edge, and a trowel work the slush over the entire mold bed filling all the corners, the top being per fectly level, the straight edge may be use in any direction or angle to the mold. In this way a very large number of posts may be made with a minimum expenditure of labor.

In the accompanying drawing, similar letters denote like parts in the various views.

Figure 1 is a top view of the annular mold bed showing two different styles of mold compartments.

Fig. 2 is a cross section through the center of the mold bed showing sloping bottoms of the mold compartments and derrick arrangement.

Fig. 3 is one of the removable mold compartments.

Fig. 4 is the large end view of the same.

position for .best results aggregate in the mold.

a small number of posts over the mold.

Fig. 5 is a small section of the exterior view of the mold bed with the mold compartments placed around.

In the accompanying drawing in Fig. l and Fig. 2, B is the mold bed preferably built of cement concrete. The bed as will be seen in the drawing slopes toward the outer periphery. .Uponthis bed are placed the removable mold compartments as shown in Figs. 2 and 3. This I do so as to get the taper on two sides of the post, while the concentric form and radial position of the compartments will produce the taper 011 the remaining two sides and at the same time retain a perfectly level top to permit the straight edge tools to be used in all directions and to the best advantage. In Fig. 2,

is an annular elevation, an integral part of the circular bed B and forms the retaining wall for the small ends of the posts. This ring has a number of small holes E for every compartment to be arranged upon the bed, the number being in accordance with the number of wires to be placed in each post. A pin or small steel rod D is placed in center of each set of above men tioned holes, projecting inwardly and serve the purpose to fasten the ends of the wires and hold the wires taut in position. The pins D at the large ends of the mold compartments also serve the same purpose.

'Fig. 3 is an individual removable mold compartment. It is preferably made of wood and forms three sides of one compartment in the mold bed. One side U, the large end T, and the bottom] F. These compartments are made so, that in all of them the same sides, either all the right or all the left sides areomitted, and when placed in position upon the mold bed, the neighboring molds will supply these missing members. I do this so as to have only one division board between each compartment and so prevent the lodging of cement between the mold compartments and save space. The end retainers for these mold compartments are formed by the annular elevation R, as shown in Figs. 1 and 2. The large end T of these mold compartments have the same number of holes E to correspond with the holes in the same position in the annular elevation R. They also have a steel pin D at approximately the center of these holes for the purpose of holding the outer ends of these wires and hold them taut in the mold compartments.

There are however'many ways to divide up the circular mold bed into radial compartments, and I do not wish'to limit my invention to any particular way.

In Figxl, the mold compartments are formed by having an outer annular ring S. This ring is an integral partof the mold bed B, the same as the inner ring R,.and con-. tains neither holes nor pins, and wire reinforcements if used at all must be laidin in the customary way as the post would be hard to be removed with the wire end pro-- truding through the holes which cannot be out very readily. For this reason I prefer the form with the removable compartments as shown in drawing Fig. 3.

In this rigid form division boards of taper form U are forced in position radially the proper distance apart, or they may be held in position by wedges, or another way is to have recesses arranged in the inner and outer rings and just drop the taper division boards into place. In Fig. 2,1 is a coil of wire which I drop over the derrick standard M by removing Windlass, W and rope, X temporarily. This wire rests upon the clerrick arm support Z. Modifications of this wire support are shown, described and claimed in a supplementary application for Letters Patent the title of which is Plant for cement products, filed June Qt, 1919, Serial Number 306,361. L in Fig. 2 is the aggregate bucket, the rope of the derrick X in the same figure passes around pulleys J and J to windlass 'W. K is a ratchet to hold bucket L at any height automatically. I prefer to hold the derrick arm Y in a rigid position by bolt H. The derrick standard is supported in a socket in base N, preferably made of reinforced cement concrete. It can be revolved in its socket. Other clevices may be added to raise and lower derrick arm Y to suit circumstances.

In operating this device I first place the individual mold sections or division boards in position after thoroughly being oiled and oil all the surfaces to which concrete might adhere. Then insert all the wires through the holes in the rings, through the various compartments and twist them around the pins to hold them in a tight position. The wire is fed from the reel around the standard of the derrick which will readily unravel when pulled. The wires are out closely after fastening them around the pins in the inner ring elevation of the mold bed. I then fill the bucket of the derrick with slush concrete aggregate from the mixer through the chute, elevate the same and meanwhile hold the bucket to keep from damaging mold bed while bucket is being elevated. With thenecessary tools I work this slush into position into the molds filling all the corners and repeat this operation, swinging the derrick further and further with more aggregate until all compartments are filled. I then smoothen the entire top the same way as flooring is generally smoothened. I then leave the cement concrete in the mold to set for a day or two according to setting qualities of cement and then pull ind vidual mold sections out after taking the wires ofi the pins, and remove the mold compartments with the posts in them to a place for further curing, where the posts are taken out of the sections and the sections taken back to the mold to be filled again. In the other case where the partition boards are separating the posts, one board is taken out then a post, then another board and another post, etc. until ,the entire bed is emptied.

Having thus described my invention I claim:

1. In a post mold as described the combination of an annular bed, radial compartments, a derrick and means for supporting said derrick at center of such annular bed substantially as described.

2. In apost mold of the form described an annular bed comprising radial compartments the bottoms of which are sloping toward the outer periphery of said annular bed. i

3. In a mold bed of annular form divided into radial compartments the bottoms of which are sloping toward the outer periphery of said mold bed, thetopsbeing level, substantially as described.

4.- In a post mold the combination of an annular bed, having an annular elevation at the inner circle having perforations and pins, with individual removable taper compartments arranged radially on said bed, said taper compartments having the small end omitted, the large end having perforations and pins to correspond with perforations and pins in said annular elevation when such compartments are placed in po- 7 substantially as described. V

V 7 CHARLES F. RUBY.

Witnesses:

H. T. RUEILE, L. L. HUMPHREY. 

